package rabbitmq.simple;

import com.rabbitmq.client.*;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class ConsumerDemo {
    public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
        //1. 创建连接
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("47.108.157.13");
        connectionFactory.setPort(5672);
        connectionFactory.setUsername("study");
        connectionFactory.setPassword("study");
        connectionFactory.setVirtualHost("bite");
        Connection connection = connectionFactory.newConnection();
        //2. 创建Channel
        Channel channel = connection.createChannel();
        //3. 声明队列(可以省略)
        channel.queueDeclare("hello",true, false, false, null);
        //4. 消费消息
        /**
         * basicConsume(String queue, boolean autoAck, Consumer callback)
         * 参数说明:
         * queue: 队列名称
         * autoAck: 是否自动确认
         * callback: 接收到消息后, 执行的逻辑
         */
        DefaultConsumer consumer = new DefaultConsumer(channel){
            //从队列中收到消息, 就会执行的方法
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("接收到消息:"+ new String(body));
            }
        };
        channel.basicConsume("hello", true, consumer);
        //等待程序执行完成
        Thread.sleep(2000);
        //5. 释放资源
        channel.close();
        connection.close();
    }
}
